Quantitative identification method of complex glutenite body lithology by wave impedance
A quantitative identification and wave impedance technology, applied in the field of quantitative identification of complex glutenite lithology using wave impedance, can solve the problems of weak compaction, difficult to quantify, and difficult to distinguish, etc., and achieves clear technical ideas, good operability, The effect of promoting
A quantitative identification and wave impedance technology, applied in the field of quantitative identification of complex glutenite lithology using wave impedance, can solve the problems of weak compaction, difficult to quantify, and difficult to distinguish, etc., and achieves clear technical ideas, good operability, The effect of promoting
CN106842359BActive Publication Date: 2018-08-17CHINA PETROLEUM & CHEM CORP +1
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[0035] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below in conjunction with the drawings, which are described in detail as follows.
[0036] Such as figure 1 As shown, figure 1 It is a flowchart of a specific embodiment of using wave impedance to quantitatively identify the lithology of complex glutenite bodies according to the present invention. In a specific example of applying the present invention, it is applied to a core well A in Xinjiang Chunhui Oilfield, such as figure 2 As shown, the quantitative batch discrimination of the lithology of the complex glutenite body is realized, including the following steps:
[0037] In step 101, use core data and log data to determine that different lithologies are induced in the array (M 2 R 1 ), Density (DEN), Acoustic Time Difference (AC), Neutron Porosity (CNL) and other logging data.
[0038] In step 102, on the basis of step 101, ...
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The invention provides a method for quantitatively recognizing lithology of complicated sandstone rocks by wave impedance. The method includes the steps: determining the distribution range of different lithology on logging curve data such as array induction, density, sound wave time difference and neutron porosity according to core data and logging data; roughly distinguishing the lithology and distinguishing mud rocks, muddy sandstone rocks and sandstone rocks by the aid of an array induction curve; finely distinguishing the lithology, finely distinguishing the muddy sandstone rocks into muddy sandstones and muddy conglomerate rocks by the aid of a density curve and finely distinguishing the sandstone rocks into sandstones and conglomerate rocks; generating a wave impedance curve and further determining calcareous sandstones and calcareous conglomerate rocks by the aid of the wave impedance. Seven types of rocks are finely distinguished by the steps. The method for quantitatively recognizing the lithology of the complicated sandstone rocks by the wave impedance has good operability and is beneficial to popularization, and a feasible novel method is provided for quantitatively recognizing lithology of the complicated sandstone rocks.
Description
Technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for quantitatively identifying the lithology of complex glutenite bodies by using wave impedance. Background technique [0002] Using conventional logging curves to identify lithology, conglomerate, lime glutenite, and oil layers all have the characteristics of high resistance. The resistivity characteristics of oil layers overlap with the characteristics of conglomerate resistivity, and it is difficult to quantitatively identify most curves. Therefore, how to use conventional logging curves to quantitatively identify lithology has always been a difficult problem in the industry, which is mainly reflected in the following aspects: [0003] 1. Spontaneous potential (SP) is a commonly used curve to distinguish sandstone and mudstone, but the measurement range of different wells, different instruments, and different batches is unstable, the application effect is not g...
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Patent Timeline
17 Aug 2018
Publication
CN106842359B
- IPC
- G01V11/00
- CPC
- G01V11/00
- Inventors
- 毕义泉; 孙业恒